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Active Microelectronic Neurosensor Arrays for Implantable Brain Communication Interfaces.

Song, Borton, S Park

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |June 2, 2021
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    Summary
    This summary is machine-generated.

    A new wireless implantable device enables 16-channel cortical signal recording in nonhuman primates. This microelectronic system transmits neural data wirelessly through the skin for advanced neural control applications.

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    Area of Science:

    • Neuroscience
    • Biomedical Engineering
    • Implantable Devices

    Background:

    • Cortical signal recording is crucial for understanding brain function and developing neural control.
    • Existing methods for cortical signal acquisition often involve wired connections, limiting mobility and increasing infection risk.
    • Wireless, implantable solutions are needed to overcome these limitations for long-term neural monitoring.

    Purpose of the Study:

    • To develop and evaluate a wireless implantable microelectronic device for transcutaneous transmission of cortical signals.
    • To enable high-channel-count, broadband neural recording for neural control applications.
    • To demonstrate the feasibility of a flexible, low-power microsystem for in-vivo neural data acquisition.

    Main Methods:

    • Construction of a 16-channel wireless implantable microsystem on a flexible polymer substrate.
    • Integration of ultra-low power amplification, analog multiplexing, analog-to-digital converter, digital controller, and infrared telemetry.
    • Testing of the device in a nonhuman primate model for sub-chronic implantation (~1 month).
    • Utilizing infrared light pulses for transcutaneous data transmission.
    • Exploring multiple power supply options including radio frequency induction and photovoltaic conversion.

    Main Results:

    • Successful 16-channel broadband neural recording in a nonhuman primate brain.
    • Robust spike and broadband neural data acquired from all channels.
    • Demonstration of wireless data transmission through the skin via infrared light.
    • Device operated reliably for approximately one month in sub-chronic implantation.

    Conclusions:

    • The developed wireless implantable microelectronic device is a viable solution for transcutaneous cortical signal transmission.
    • The microsystem enables high-fidelity neural recording for potential neural control applications.
    • The technology offers a scalable and flexible platform for future advancements in brain-computer interfaces.